A force On particle is conservative if:________? April 17, 2025 by admin A. It’s works equals the change in the kinetic energy of the particle. B. It’s obeys Newton’s second law C. It’s obeys Newton’s third law D. It work depends on the end points of every…
Electric current in a solid metal conductor is caused by the movement of what ? April 17, 2025 by admin A. Protons B. Electrons C. Metal atoms D. Metal ionsElectric current in a solid metal conductor is…
The core of a transformer is laminated to reduce energy losses due to__________? April 17, 2025 by admin A. Eddy currents B. Hysteresis C. Resistance in winding D. None of these
An emf of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3 to 2 ampere in 1 millisecond. The value of self inductance is_______? April 17, 2025 by admin A. zero B. 5 H C. 5000 H D. 5 mH
Two parallel beams of positrons moving in the same direction will________? April 17, 2025 by admin A. repel each other B. not interact with each other C. attract each other D. be deflected normal to the plane containing the two…
A piece of copper and a piece of germanium are cooled from the room temperature down to 77 K. April 17, 2025 by admin A. The resistance of each of them increases. B. The resistance of each of them decreases. C. The resistance of copper decreases and that of germanium increases. D. The resistance of copper increases and that of germanium…
How many electrons per second constitute a current of one micro ampere? April 17, 2025 by admin A. one electron B. 10 –6 electrons C. 106 electrons D. 6.25 × 1012 electrons
In bringing an electron towards the second electron, the electrostatic potential energy of the system April 17, 2025 by admin A. Decreases B. increases C. remains the same D. becomes zero
A cube of side 5 cm has a charge of 6 C. The surface density of charge is_________? April 17, 2025 by admin A. 100 C m–2 B. 200 C m–2 C. 300 C m–2 D. 400 C m–2
