NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
All Subjects
Deepesh Bhardwaj
Subject: Physics
, asked 1 week, 2 days ago
Please answer answer the question based on chapter electricity pls hlp
Answer
1
Deepesh Bhardwaj
Subject: Physics
, asked 1 week, 2 days ago
Please answer answer the question based on chapter electricity
Answer
1
Liyana Amin
Subject: Physics
, asked 1 week, 2 days ago
Experts please answer
A wire is connected between the point P and Q in circuit to carry a current I .if it is replaced by a wire of same length and half thickness. how will the current vary?
THANK YOU
Answer
1
Shubh Soumya
Subject: Physics
, asked 1 week, 3 days ago
Is 9.8x 10??? c charge possible on a body?
Answer
1
Akanksha Dwivedi
Subject: Physics
, asked 1 week, 4 days ago
Playing with an old lens one morning, Ravi discovers that if he holds the lens 10 cm
away from a wall opposite to a window he can see a sharp but upside down image of
outside world on the wall. That evening he covers a lighted lamp with a piece of
opaque paper on which he has pierced a small hole 1 mm in diameter. By placing the
lens between the illuminated paper and the wall, he manages to produce a sharp image
of diameter 5 mm on the wall.
1. What is the nature of the lens?
2. What is the focal length of the lens?
3. Calculate the power of the lens.
4. In the evening experiment how far from the opaque paper did he place the lens?
5. How far apart were the illuminated paper and the wall?
Answer
2
Liyana Amin
Subject: Physics
, asked 1 week, 5 days ago
Experts please answer...
Question 1
Draw a circuit diagram showing a cell, a bulb and a closed switch.
Question 2
??????????????a)??How much work is done in moving a charge of 3 coulumb from a point at the volts 115 to a point at 125 volts?
??????????????b)??Ammeter burns out when connected in parallel. Give reasons.
Question 3
Given n resistors each of resistors Rs. How will you combine them to get the (i) maximum and (ii) minimum effective resistance? What is the ratio of the maximum to minimum resistance?
Question 4
a) A wire of length L and resistance R is stretched so that its length it?s doubled. How will the: (a) Resistance change(b) Resistivity change?
??????????????b)??In an experiment the current flowing through a resistor and potential difference across it are measured. The values are given below. Show that these values confirm Ohm?s Law
??????????????I (ampere) 1.0 1.0 2 1.5 2.0 2.0 2.5 2.5 3.0 3.0
??????????????V (volt) 4.0 4.0 6.0 6.0 8.0 8.0 10.0 10.0 12.0 12.0
Question 5
a) A tube light draws 0.1 A current from a 220 V supply. What current will this tube light draw when it is connected to a 110 V supply?
b) An electric wire is stretched to increase its length by 25%.By what % will the resistance be increased and what will be increase in its resistivity?
Thank you so much! :)
Answer
6
Ujjwal Kumar
Subject: Physics
, asked 1 week, 5 days ago
Please solve this question experts...
Answer
2
Johann Premjith
Subject: Physics
, asked 1 week, 6 days ago
Draw diagrams to show magnetic field lines around a current carrying #
(a) straight conductor
(b) solenoid
Answer
1
Liyana Amin
Subject: Physics
, asked 1 week, 6 days ago
Experts please answer...
(a) The electric power consumed by a device may be calculated by using either of the two expressions P = 12R or P =V2/R . The first expression indicates that it is directly proportional to R whereas the second expression indicates inverse proportionality. How can the seemingly different dependence of P on R in these expressions be explained?
(b)??(i) A 100 W electric bulb is connected to 220 V mains power supply. Calculate the strength of the electric current passing through the bulb. (ii) If the same bulb is taken to U.S.A where the main power supply is 110 V, how much electric current will pass through the bulb when connected to mains?
Thank you! :)
Answer
1
Fasiha Fatima
Subject: Physics
, asked 1 week, 6 days ago
What is the power of a convex mirror whose focal length is 25 cm?
Answer
2
Yashvi Savalia
Subject: Physics
, asked 1 week, 6 days ago
Is 9.8 ? 10^-12 coulomb charge is possible on a body?
Answer
2
Prateek.k
Subject: Physics
, asked 1 week, 6 days ago
Why the class is not started it's already 1:51
Answer
1
Johann Premjith
Subject: Physics
, asked 1 week, 6 days ago
In the given circuit diagram , the cell and ammeter, both have negligible resistance. The resistances are identical. With the switch 'k' open, the ammeter reads 0.6A. What will be the ammeter reading when the switch is closed?
Answer
1
Johann Premjith
Subject: Physics
, asked 1 week, 6 days ago
3 cylindrical copper conductors having length L , 2L and L/2 respectively have their face areas A, A/2 and 2A respectively are given. Which of the conductors willhave the highest resistance and why? Compare their resistivity.
Answer
1
Vedang Belgaumkar
Subject: Physics
, asked 1 week, 6 days ago
After what time a ball thrown at an inclination 'a' with speed 'u' , will appear to be at inclination 'b' as observed from the point of throw
Answer
2
Prev
1
2
3
4
5
Next
What are you looking for?

A wire is connected between the point P and Q in circuit to carry a current I .if it is replaced by a wire of same length and half thickness. how will the current vary?

THANK YOU

away from a wall opposite to a window he can see a sharp but upside down image of

outside world on the wall. That evening he covers a lighted lamp with a piece of

opaque paper on which he has pierced a small hole 1 mm in diameter. By placing the

lens between the illuminated paper and the wall, he manages to produce a sharp image

of diameter 5 mm on the wall.

1. What is the nature of the lens?

2. What is the focal length of the lens?

3. Calculate the power of the lens.

4. In the evening experiment how far from the opaque paper did he place the lens?

5. How far apart were the illuminated paper and the wall?

Question 1

Draw a circuit diagram showing a cell, a bulb and a closed switch.

Question 2

??????????????a)??How much work is done in moving a charge of 3 coulumb from a point at the volts 115 to a point at 125 volts?

??????????????b)??Ammeter burns out when connected in parallel. Give reasons.

Question 3

Given n resistors each of resistors Rs. How will you combine them to get the (i) maximum and (ii) minimum effective resistance? What is the ratio of the maximum to minimum resistance?

Question 4

a) A wire of length L and resistance R is stretched so that its length it?s doubled. How will the: (a) Resistance change(b) Resistivity change?

??????????????b)??In an experiment the current flowing through a resistor and potential difference across it are measured. The values are given below. Show that these values confirm Ohm?s Law

??????????????I (ampere) 1.0 1.0 2 1.5 2.0 2.0 2.5 2.5 3.0 3.0

??????????????V (volt) 4.0 4.0 6.0 6.0 8.0 8.0 10.0 10.0 12.0 12.0

Question 5

a) A tube light draws 0.1 A current from a 220 V supply. What current will this tube light draw when it is connected to a 110 V supply?

b) An electric wire is stretched to increase its length by 25%.By what % will the resistance be increased and what will be increase in its resistivity?

Thank you so much! :)

(a) straight conductor(b) solenoid

(a) The electric power consumed by a device may be calculated by using either of the two expressions P = 12R or P =V2/R . The first expression indicates that it is directly proportional to R whereas the second expression indicates inverse proportionality. How can the seemingly different dependence of P on R in these expressions be explained?

(b)??(i) A 100 W electric bulb is connected to 220 V mains power supply. Calculate the strength of the electric current passing through the bulb. (ii) If the same bulb is taken to U.S.A where the main power supply is 110 V, how much electric current will pass through the bulb when connected to mains?

Thank you! :)