(A) Frequency
(B) Aplitude
(C) Wavelength
(D) Speed
What is the equation of Joule’s law?
(A) w=I2Rt
(B) w=IR2t
(C) w=IRt2
(D) w=IR
What is the unit of capacitance?
(A) Farad
(B) Volt
(C) Watt
(D) Ampere
Sound is form of which type of energy?
(A) Mechanical
(B) Electrical
(C) Thermal
(D) Chemical
A doctor counts 72 heartbeats in 1 minute. Its time period is?
(A) 0.83 second
(B) 1.2 second
(C) 60 second
(D) 72 second
Example of simple harmonic motion?
(A) The motion of a simple pendulum
(B) The motion of earth on its axis
(C) The motion of a ceiling fan
(D) Bouncing ball on the floor
Process by which electrons are emitted by hot metal surface is known as?
(A) Boiling
(B) Evaporation
(C) Conduction
(D) Thermionic emission
Which device decrease the alternating voltage?
(A) Step down transformer
(B) Step up transformer
(C) Generator
(D) Motor