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Subject: Physics, asked on 2/4/18

When can we say that bulb will be out:
1)current passed >capacity
2)potential diff.is more
3)power applied is more?

Subject: Physics, asked on 30/3/18

how to find the equivalent resistance in this circuit?

Subject: Physics, asked on 13/2/18

What is the actual answer of my question(at the top)? It may be in higher class,but i wanna know

Subject: Physics, asked on 10/2/18

Works done equals to f×s. Now, when the test charge is taken around the circuit, the displacement is zero. Then the EMF of the cell should be equals to zero!!??

    The e.m.f. of a cell is defined as the energy spent (or the work done) per unit charge in taking a positive test charge around the complete circuit of the cell (i.e., in the circuit outside the cell as well as in the electrolyte inside the cell).

Subject: Physics, asked on 10/2/18

A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more, same or less when the bulb is not glowing?

Subject: Physics, asked on 10/2/18

For which of the following substances, resistance decreases with increase in temperature?
(a) copper                (b) mercury                 (c) carbon               (d) platinum.

Subject: Physics, asked on 29/8/22

What is electron, please explain?

Subject: Physics, asked on 22/2/22

Three identical metal spheres A b and c are supported on separate insulated stands and placed in contact with each other a glass rod is rubbed with silk and brought near to the sphere A what type of charge will there be on sphere A b and c?

Subject: Physics, asked on 22/2/22

A negatively charged body is held near the cap of an uncharged gold leaf electroscope.The chap of the electroscope is connected to the charged body with (a)dry silk thread (b)a copper wire. Draw a diagram in each case to show the divergence of the leaf and the charge is any on the leaves.

Subject: Physics, asked on 22/2/22

Please help with 19

Subject: Physics, asked on 22/2/22

Solve number 16 please

Subject: Physics, asked on 22/2/22

Please solve number 15

Subject: Physics, asked on 22/2/22

Solve 8(a) please.

Subject: Physics, asked on 22/2/22

Solve this question please.

Subject: Physics, asked on 16/2/22

A electric kettle of 2000W is used to boil 20 litres of water. Find the time required to boil the water from its initial temperature of 20oC. (Take specific heat of water as 4200 J kg-1 K-1. Density of water = 1000 kg m-3)

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