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Physics Mcqs

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 ?

Alternating Current, Physics Mcqs /
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

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 ? Read More »

Alternating Current, Physics Mcqs

What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ?

Alternating Current, Physics Mcqs /
What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ?

A. 0.5 mH
B. 0.5H
C. 2.0H
D. 8.0H

What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ? Read More »

Alternating Current, Physics Mcqs

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_______________?

Alternating Current, Physics Mcqs /
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

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_______________? Read More »

Alternating Current, Physics Mcqs

A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________?

Alternating Current, Physics Mcqs /
A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________?

A. (R+2πfL)
B. R+1/2πfL
C. (R2+f2L2)
D. (R2+4π2f2L2)

A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________? Read More »

Alternating Current, Physics Mcqs

If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb________________?

Alternating Current, Physics Mcqs /
If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb________________?

A. Remains same
B. Brightness increases
C. Brightness decreases
D. No light

If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb________________? Read More »

Alternating Current, Physics Mcqs

A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________?

Alternating Current, Physics Mcqs /
A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________?

A. 32Ω
B. 62Ω
C. 50Ω
D. 100Ω

A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________? Read More »

Alternating Current, Physics Mcqs