physics

The core of a transformer is usually laminated in order to?

A. reduce magnetic leakage B. reduce eddy current C. prevent vibration of the transformer D. make magnetic reversal in the…

6 years ago

The magnetic relay is a device used for?

A. timing in sports B. storing magnetic field C. read the magnitude of magnetic flux D. controlling another circuit carrying…

6 years ago

A 120Ω resistor dissipates 8 kJ of heat in 20s. Calculate the current through the resistor.

A. 5.8A B. 6.9A C. 30.0A D. 33.3A Correct Answer: Option A A. 5.8A

6 years ago

The sound heard by a person after the reflection of the sound generated by him is called?

A. reverberation B. resonance C. echo D. audibility Correct Answer: Option C C. echo

6 years ago

Which of the following properties is an advantage of lead-acid accumulator over an alkaline accumulator?

A. possesses low internal resistance B. can be recharges C. has a shorter life span D. possesses high e.m.f Correct…

6 years ago

When two like charges are brought together, the potential energy of the system formed will?

A. increase because work is done against the field B. increase because work is done by the field C. decrease…

6 years ago

Which of the following sets of coloured light is/are secondary colours?

i. Red, Blue and green ii. Blue, cyan and magneta iii. Green, Magenta and yellow, IV Yellow, Cyan and Magenta…

6 years ago

The sound heard by a person after the reflection of the sound generated by him is called?

A. reverberation B. resonance C. echo D. audibility Correct Answer: Option C C. echo

6 years ago