Physics Past QuestionsQuestion 651:Which of the following obeys Ohm's Law? A. Glass B. Diode C. All electrolytes D. All metals Question 652:An equipment whose power is 1500W and resistance is 375 ohms would draw a current of A. 0.10A B. 2.00A C. 4.00A D. 77.5A Question 653:To convert an alternating current dynamo into a direct current dynamo, the A. Number of turns in the coil is increased B. Strength of the field magnet is increased C. Slip rings are replaced with a split ring commutator D. Coil is wound on a soft iron armature Question 654:If a current carrying coil is mounted on a metal frame, the back e.m.f. induced in the coil causes A. Inductance B. Eddy currents C. Elecro-magnetism D. Dipole moment Question 655:The electrochemical equivalent of platinum is 5.0 x 10-7kgC-1 to plate-out 1.0kg of platinum, a current of 100A must be passed through an appropriate vessel for A. 5.6 hours B. 56 hours C. 1.4 x 104 hours D. 2.0 x 104 hours |
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