Questions
Consider a parallel circuit with 10 cells each in 5 rows with emf 1.5 volt and resistance 1 Ω, where there is an external resistance of 20 Ω. Calculate the current.
- 0.166 amp
- 0.434 amp
- 230 amp
- 330 amp
- 0.68 amp
Calculate the amount of electric charge that flows through the circuit with a current of 0.5 A in 5 minutes.
- 1.6 x 10-3 C
- 150 C
- 600 C
- 10 C
- 2.5 C
In series grouping, the anode of one cell is connected to the cathode of another cell. Which of the following properties is not related to n identical cells connected in series?
- P = (nE/R + nr)2 x R
- Req = r/n
- Eeq = nE
- i = nE/R + nr
- V = iR
Calculate the current when heating is at the maximum rate of an electric device, which consumes energy at a rate of 600 W, where the voltage is 220 V.
- 0.366 A
- 2.72 A
- 80.66 A
- 0.012 A
- 1636.3 A
Which of the following devices is used to measure the potential difference across a conductor?
- Wattmeter
- Voltmeter
- Ammeter
- Galvanometer
- Thermometer
Calculate the value in unit of the commercial unit of electric energy, which is kilowatt hour (kW h),
- 3.6 × 106 joule
- 0.277 joule
- 16.66 joule
- 60000 joule
- 6000 joule
Which of the following represents the case in which electric charge does not move?
- Current electricity
- Conductor
- Static electricity
- Electric potential
- Potential difference
If electrons move around the nucleus of radius 5 × 10–11m and time period is 1.5 × 10–16s, what is the current?
- 2.4 x 10-35 A
- 0.937 x 103 A
- 1.07 x 10-3 A
- 0.585 x 1022 A
- 1.70 x 10-22 A
Which of the following factors is essential in measuring the potential difference by an instrument?
- Instrument having a low resistance.
- Voltmeter is always connected in parallel across the points.
- We use an ammeter to measure the potential difference.
- The potential difference across the inductor increases.
- The potential difference across the resistor is not zero.
If 5 V battery consists of a charge coulomb passing through it, then calculate the energy.
- 8 x 10-19 C
- 3.12 x 1019 C
- 15.62 x 1019 C
- 40 x 10-19 C
- 0.32 x 10-19 C
Which of the following factors does not affect the resistance of a conductor?
- Effect of length of a conductor
- Effect of area of cross section of a conductor
- Effect of nature of material of a conductor
- Effect of temperature
- Effect of pressure
Which of the following formulas is used for heat produced in a wire?
- I2 x R x t
- I x t
- V x I
- V x I x t
- W/t
Why is the parallel electric circuit better for connecting bulbs in a house?
- The overall resistance of the circuit increases too much.
- Electrical appliance gets the same voltage.
- Electrical appliances have only one switch.
- If one electrical appliance stops working, then the others also stop working.
- They have a single operation.
Which of the following applications is not suitable for the heating effect of current?
- Electric fuse
- CFL's
- Electric bulb
- Electric iron
- Water geysers
Which of the following formulas is used for power in terms of I and R?
- P = IR
- P = I2/R
- P = I2R
- P = I/R
- P = R/I2