2 The formula R = ρL/A shows that resistance is directly proportional to: A Area B Length C Current D Voltage
3 One volt is equal to: A One joule per coulomb B One coulomb per joule C One ampere per second D One ohm per ampere
4 Which phenomenon allows qubits to be in multiple states? A Diffraction B Superposition C Reflection D Refraction
5 The main advantage of digital electronics is: A Complexity B Noise immunity C High cost D Large size
6 To convert a galvanometer into a voltmeter, we connect: A Low resistance in parallel B Low resistance in series C High resistance in series D High resistance in parallel
7 Which wire in household circuits carries current to the appliance? A Earth wire B Neutral wire C Live wire D Ground wire
8 The internal resistance of a cell causes: A Increase in terminal voltage B Decrease in terminal voltage C No effect D Infinite current
9 An increase in temperature of a metallic conductor generally causes its resistance to: A Decrease B Remain same C Increase D Become zero
14 When a transistor is used as a switch, it operates in: A Active region B Cut-off and saturation regions C Linear region D Breakdown region
15 LEDs are preferred over filament bulbs because they: A Consume more power B Produce heat C Have longer life D Are fragile
17 The output of a NAND gate is 0 only when: A Both inputs are 0 B Any input is 0 C Both inputs are 1 D Inputs are different
19 Which instrument is most sensitive for detecting small currents? A Ammeter B Voltmeter C Galvanometer D Ohmmeter
20 In Ohm’s Law experiment, the graph between V and I is: A A straight line B A curve C A circle D A parabola