A. Battery
B. Capacitor
C. Dynamo
D. Transformer
Submitted by: Rizwan Ayub Saadi
Related Mcqs:
- Production of heat due to an electric current flowing through a conductor is given by _________________?
A. Joule effect
B. Joule Thomsons effect
C. Comptons effect
D. Feed back effect - An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?
A. 12
B. 24
C. 5
D. 1100 - An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if_________________?
A. E = BeV
B. B = eE/V
C. E = BV
D. E = BeV/2 - 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 - In the electron microscope, electric & magnetic fields are used as_______________?
A. Electromagnetic gun
B. Source of electromagnetic waves
C. Deflecting charged particle
D. Converging source of electrons - The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?
A. Ke2/rn
B. Ke2/rn2
C. ÀKe2/rn
D. ÀKe2/rn2 - Electric current in a solid metal conductor is caused by the movement of what ?
A. Protons
B. Electrons
C. Metal atoms
D. Metal ionsSubmitted by: Ahmed Khan
- Which of the following are not deflected by electric and magnetic fields ?
A. Alpha rays
B. Beta rays
C. Gamma rays
D. None of theseSubmitted by: Aamir Balouch
- A bird sitting on a high tension electric wire does not get electrocuted because:
A. Sit has high resistance
B. the body is earthed
C. it does not form a closed path for the flow of current
D. its feet are good insulatorsSubmitted by: Abid Hussain
- The back emf of a motor which is just started is_________?
A. Zero
B. Maximum
C. Minimum
D. OptimumSubmitted by: Raza Baloch
The correct answer to the question: "An electric motor could be used as a: ___________?" is "Dynamo".