A potential difference is applied across the ends of a wire. If the potential difference is doubled, then the drift velocity of free electron will.

Related Mcqs:

1. When a force is applied at one end of an elastic wire it produces at strain ∝ in the wire. If y is the youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by_________________?

   A. Y∝ B. 2Y∝ C. Y∝/2 D. Y∝2...

2. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

   A. Same B. Different C. At L will be more than at C D. At L will be less than at C...

3. n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________?

   IA. V = VR+VL+VC B. V2 = VR2+VL2+VC2 C. V2 = VR2+(VL-VC)2 D. V2 = VL2+(VR-VC)2...

4. A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ?

   A. 0.01J B. 0.02J C. 0.04J D. 1.0J...

5. In bringing an electron towards the second electron, the electrostatic potential energy of the system

   A. Decreases B. increases C. remains the same D. becomes zero Submitted by: Tauseef Ali...

6. A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________?

   A. FE B. (FE) C. FE2/L D. FE2...

7. A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it ?

   A. 4 volt B. 5 volt C. 2 volt D. 0.4 volt...

8. A capacitor of capacitance 30µF is charged by a constant current of 10mA. If initially, the capacitor was uncharged what is the time taken for the potential difference across the capacitor to reach 300V ?

   A. 0.9sec B. 15 sec C. 1.5x105sec D. 0.9x102sec...

9. A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?

   A. 220V B. 220/ 2V C. 110V D. 220 √2V...

10. For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?

    A. 107m/sec B. Should be greater than the speed of light. C. Be zero D. Not be wave-like...