10th Class Physics Chapter 8 Test17. Electric circuits

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Electricity ensures our devices remain functional by:
   1. Cooking food
   2. Recharging batteries
   3. Cooling the environment
   4. Producing light
2. A thermistor is generally made from:
   1. Metal wire
   2. Semiconductor material
   3. Plastic
   4. Glass
3. Active elements in a circuit:
   1. Absorb energy
   2. Supply or generate energy
   3. Block current
   4. Measure current
4. In a resistor, the first two bands represent:
   1. Multiplier
   2. Tolerance
   3. Significant figures of resistance
   4. Voltage drop
5. Electrical hazards may be caused by:
   1. Strong insulators
   2. Damaged insulation
   3. Proper maintenance
   4. Circuit breakers
6. In carbon resistors, the resistance value is usually represented by:
   1. Printed numbers
   2. Colour code
   3. Voltage markings
   4. Shape of resistor
7. Residual-Current Devices (RCDs) detect:
   1. High resistance
   2. Difference in current between live and neutral
   3. Excess voltage
   4. Power loss
8. The standard voltage for household appliances is around:
   1. 110 V
   2. 220 V
   3. 12 V
   4. 440 V
9. A current of 50–100 mA through the human body can cause:
   1. Tingling sensation
   2. Pain
   3. Breathing becomes extremely difficult
   4. No effect
10. Which application of electricity is related to productivity and communication?
    1. Heating
    2. Lighting
    3. Powering electronic systems
    4. Cooking