Science Class 7th
411. Which of the following has Parallel circuit?
A) Chandelier
B) Electrical appliances in home
C) Both “a” and “b”
D) None of these
412. While connecting cells in series, you must connect
A) Positive terminal with positive
B) Positive terminal with negative
C) None of these
413. While connecting cells in parallel, you must connect?
A) Positive terminal of one to positive of another
B) Positive with negative
C) Negative with positive
D) None
414. Which of the following have more resistance?
A) Long wires
B) Thick wires
C) Both ‘a’ and ‘b’
D) None of these
415. Electrical energy is measured in?
A) Joules
B) Watts
C) Both ‘a’ and ‘b’
D) None of these
416. Electrical ____ is the amount of heat generated due to resistance during the flow of current for certain period of time.
A) Power
B) Energy
C) Both a & b
D) None of these
417. A fan converts electrical energy into?
A) Mechanical
B) Potential
C) Heat
D) None of these
418. Electric current produces effects.
A) Magnetic
B) Chemical
C) Heating
D) All of these
419. Electromagnets are used in?
A) Electric bells
B) Electric motors
C) Loud speaker
D) All of these
420. Chemical effect of current is used in?
A) Electroplating
B) Extraction of metal
C) Purification of metals
D) All of these
421. Heating effect is utilized in ____ electric appliances
A) Room heater
B) Electric bulb
C) Room heater
D) All of these
422. The potential difference between two points in a circuit or battery is called?
A) Volt meter
B) Voltage
C) Unit
D) None
423. “Volt” is named after?
A) Alessandro Volta
B) Newton
C) Hobbs
D) None
424. Alessandro Volta invented the first?
A) Bulb
B) Pen
C) Chemical Battery
D) None of these
425. Voltages is represented by letter?
A) v
B) V
C) Volt
D) None
426. The opposition to the flow of charge is called?
A) Voltage
B) Resistance
C) Volt
D) Opposition
427. Current and Voltage are Proportional.
A) Directly
B) Indirectly
C) Both ‘a’ and ‘b’
D) None
428. Resistance is measured in?
A) Joule
B) Volt
C) Ohms
D) None
429. A dimmer switch makes use of?
A) Resistance
B) Bulb
C) Low light
D) None
430. With addition of more bulbs in series circuit, resistance?
A) Decreases
B) Increases
C) Both a & b
D) None of these