Physics Class 10th
381. Batteries are rated with unit ampere hour. It is unit of:
A) Charge
B) Current
C) Power
D) Energy
382. When connected to a battery, a light bulb glows brightly, if the battery is reversed and reconnected to the bulb, the bulb will glow:
A) Brighter
B) Dimmer
C) With The Same Brightness
D) And Fuse
383. The resistance of wire will decrease by increasing:
A) Temperature
B) Length
C) Diameter
D) Both A And B
384. The Wire made from which of the following material is a conductor:
A) Glass
B) Rubber
C) Silver
D) Silk
385. The current which reverses direction after regular intervals of time is:
A) DC
B) AC
C) Convectional current
D) Both A and B
386. Electricity main supply meter measures it in units of kilowatts – hr, it is
A) Heater
B) Fuse
C) Lamp
D) All of the these
387. Which of the following represents one ohm:
A) VA-1
B) JS-1
C) WA-1
D) D.JC-1
388. Two resistance of 1 Ohm are connected in parallel, the equivalent resistance is:
A) 2 Ὼ
B) 1.5 Ὼ
C) 1 Ὼ
D) 0.5 Ὼ
389. 1 kWh=
A) 3600W
B) 1000J
C) 3.6×106J
D) 0.36hrs
390. An electric current in conductor is due to:
A)Positive Ion
B) Negative ions
C) Positive charges
D) Free Electrons
391. What is the voltage across a 6 Ὼ resistor when a 3 A of current passes through it.
A) 2 V
B) 9V
C) 18V
D) 36V
392. Why should household appliances be connected in parallel with the voltage source?
A) to increase the resistance
B) to decrease the resistance
C) to provide each appliance the same voltage from the power source
D) to provide each appliance same current from the power source
393. Electric potential and EMF
A) are the same terms
B) are different terms
C) have different units
D) both B and C
394. When we double the voltage in an electric circuit , er double the :
A) Current
B) Power
C) Resistance
D) Both A and B
395. Battery converts chemical energy into:
A) Mechanical
B) Electrical
C) Thermal
D) none
396. The resistance in conductors Is due to:
A) Protons
B) Fixed atoms
C) Molecules
D) Neutrons
397. According to Ohm law V=
A) I2R
B) IR2
C) IR
D) 1/R.
398. How is galvanometer connected in circuit to detect current.
A) In series
B) In Parallel
C) Fixed
D) Variable
399. The unit of Power is :
A) Volt
B) Watt
C) Joule
D) Coulomb
400. The current used In household is:
A) Current
B) conventional Current
C) AC
D) DC