NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Prerna Varshney
Subject: Physics
, asked on 3/5/18
Question no 15
Please give proper reason of each step in your solution .
Answer
1
Prerna Varshney
Subject: Physics
, asked on 3/5/18
Please give proper reason of each step of your solution with suitable figure.
12.
The horizontal range and maximum height attained by a projectile are R and H respectively. If a constant horizontal acceleration
α
= g/4 is imparted to the projectile due to wind, then its horizontal range and maximum height will be
(
a
)
R
+
H
,
H
2
(
b
)
R
+
H
2
,
2
H
(
c
)
R
+
2
H
,
H
(
d
)
R
+
H
,
H
Answer
1
Prerna Varshney
Subject: Physics
, asked on 3/5/18
Please give your proper reason of each step in your solution with suitable figure
10.
A particle of mass m is projected with a velocity v making an angle of 45
°
with the horizontal. The magnitude of angular momentum of projectile about the point of projection when the particle is at its maximum height h is
(
a
)
z
e
r
o
(
b
)
m
v
h
2
(
c
)
m
v
h
2
2
(
d
)
N
o
n
e
o
f
t
h
e
s
e
Answer
1
Bhavya Jain
Subject: Physics
, asked on 3/5/18
Look at the following question. It is given that the bulbs are in series. Should we use P=(V*V)/R or P=(I*I)R ? Also, as it is given that bulbs are in series ,should current be constant across bulbs voltage vary? If yes,How to obtain the answer using P=I*I*R? (As both equations will give completely opposite answers) please no link, just think about it ,there is nothing worth linking in this question its direct concept clearing question. Thank you
Q.85. Three bulbs of 40 W, 60 W and 100 W are arranged in series with 220 V, which bulb has minimum resistance?
(a) 100 W
(b) 40 W
(c) 60 W
(d) equal in all bulbs
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 2/5/18
b)
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 2/5/18
For this circuit plz write Kirchoff's Loop rule for loop ADCA
Answer
1
Lavneesh Rajput
Subject: Physics
, asked on 2/5/18
describe the si unit of calorie
Answer
1
Prerna Varshney
Subject: Physics
, asked on 1/5/18
( kindly donot give any link and donot ) explain each and every step of your answer donot use this formula tan(beta)=
{vsin(theta)- gt }/vcos(theta):
8. A projectile is thrown in the upward direction making an angle of 60
o
with the horizontal direction with a velocity of 147 ms
-1
. Then, the time after which its inclination with the horizontal is 45
o
, is.
(a) 15 s (b) 10.98 s (c) 5.49 s (d) 2.745 s
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 1/5/18
Q. Calculate I1 in the circuit
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 1/5/18
Q. Calculate I1 in the circuit
Answer
1
Poonam Tripathi
Subject: Physics
, asked on 1/5/18
Kindly tell overall resistance step by step
Q. Equivalent Resistance between P & Q?
Answer
1
Poonam Tripathi
Subject: Physics
, asked on 1/5/18
Plz answer
Q. Equivalent resistance between P & Q?
Answer
1
Poonam Tripathi
Subject: Physics
, asked on 1/5/18
Overall resistance
Q. Equivalent Resistance between P & Q?
Answer
2
Prerna Varshney
Subject: Physics
, asked on 1/5/18
Solve this :
3. A piece of marble is projected from the earth's surface with velocity of 50 ms
-1
. 2 s later, it just clears a wall 5 m high. What is the angle of projection ?
(a) 45
o
(b) 30
o
(c) 60
o
(d) None of these
Answer
1
Prerna Varshney
Subject: Physics
, asked on 30/4/18
Please give proper reason of each step in your solution with suitable figure
Q.27. A coin placed on a rotating turn table just slips, if it is placed at a distance of 8 cm from the centre. If angular velocity of the turn table is doubled, it will just slip at a distance of
(a) 1 cm
(b) 2 cm
(c) 4 cm
(d) 8 cm
Answer
1
Prev
3
4
5
6
7
Next
What are you looking for?
Please give proper reason of each step in your solution .
12. The horizontal range and maximum height attained by a projectile are R and H respectively. If a constant horizontal acceleration = g/4 is imparted to the projectile due to wind, then its horizontal range and maximum height will be
10. A particle of mass m is projected with a velocity v making an angle of 45 with the horizontal. The magnitude of angular momentum of projectile about the point of projection when the particle is at its maximum height h is
Q.85. Three bulbs of 40 W, 60 W and 100 W are arranged in series with 220 V, which bulb has minimum resistance?
(a) 100 W
(b) 40 W
(c) 60 W
(d) equal in all bulbs
{vsin(theta)- gt }/vcos(theta):
8. A projectile is thrown in the upward direction making an angle of 60o with the horizontal direction with a velocity of 147 ms-1. Then, the time after which its inclination with the horizontal is 45o, is.
(a) 15 s (b) 10.98 s (c) 5.49 s (d) 2.745 s
Q. Equivalent Resistance between P & Q?
Q. Equivalent resistance between P & Q?
Q. Equivalent Resistance between P & Q?
3. A piece of marble is projected from the earth's surface with velocity of 50 ms-1. 2 s later, it just clears a wall 5 m high. What is the angle of projection ?
(a) 45o (b) 30o
(c) 60o (d) None of these
Q.27. A coin placed on a rotating turn table just slips, if it is placed at a distance of 8 cm from the centre. If angular velocity of the turn table is doubled, it will just slip at a distance of
(a) 1 cm
(b) 2 cm
(c) 4 cm
(d) 8 cm