Time Left:
600
sec
1. The circuit with higher current rating (15 A) is used for
A. Fans and bulbs
B. Geysers and coolers
C. Radios and LEDs
D. Small toys
2. The circuit with 5 A rating is used for
A. Refrigerators
B. Geysers
C. Bulbs and fans
D. Air conditioners
3. Domestic appliances are connected in
A. Series
B. Parallel
C. Combination
D. Random
4. Overloading occurs when
A. Too many appliances are connected to one socket
B. Current is zero
C. Voltage is constant
D. Appliances are off
5. When live and neutral wires touch directly, it is called
A. Overheating
B. Short circuit
C. Earth fault
D. Magnetic effect
6. During short circuit, current in the circuit
A. Decreases
B. Becomes zero
C. Increases heavily
D. Remains constant
7. The device that prevents damage due to overloading is
A. Switch
B. Rheostat
C. Fuse
D. Battery
8. The working of fuse is based on
A. Fleming’s rule
B. Joule heating effect
C. Oersted’s law
D. Induction
9. MRI technology is based on
A. Sound waves
B. Magnetic fields
C. X-rays
D. Heat energy
10. Which organs produce significant magnetic fields in the body?
A. Lungs and liver
B. Heart and brain
C. Kidney and stomach
D. Skin and bones
11. The magnetic field inside a solenoid compared to outside is
A. Stronger and uniform inside
B. Zero inside
C. Equal inside and outside
D. Weaker inside
12. An electromagnet is formed when
A. Copper coil is empty
B. Soft iron is placed inside solenoid
C. Aluminium rod is used
D. Resistance decreases
13. A positively charged particle projected west is deflected north.The magnetic field is
A. South
B. East
C. Downward
D. Upward
14. A wire with green insulation in household supply is
A. Live wire
B. Neutral wire
C. Earth wire
D. Fuse wire
15. Fuse protects the circuit by
A. Increasing resistance
B. Breaking when current is high
C. Lowering voltage
D. Increasing current
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