CBSE Board Class X Science Sample Paper - 3 Term 2_2

An electric oven of 2kW power rating is operated in a domestic electric circuit that has a current rating of 5A. If the supply voltage is 220V, what result do you expect? Explain. What information is given in the numerical.

• Power (P) = 2kw =2000W

  Current (I) = 5A

  Voltage (V) = 220V

• Power = current × voltage

  therefore P = I × V

• Current = Power/voltage

  I = P/V

  I = 2000/220

• I = 9.0909 A

• As the amount of current flowing in the conductor is more than 5 A which is the safe limit, then the fuse will get broken and hence the circuit will get open.

An electric oven of 2kW power rating is operated in a domestic electric circuit that has a current rating of 5A. If the supply voltage is 220V, what result do you expect? Explain. What is the formula for power?

• Power (P) = 2kw =2000W

  Current (I) = 5A

  Voltage (V) = 220V

• Power = current × voltage

  therefore P = I × V

• Current = Power/voltage

  I = P/V

  I = 2000/220

• I = 9.0909 A

• As the amount of current flowing in the conductor is more than 5 A which is the safe limit, then the fuse will get broken and hence the circuit will get open.

An electric oven of 2kW power rating is operated in a domestic electric circuit that has a current rating of 5A. If the supply voltage is 220V, what result do you expect? Explain. How will you calculate Current?

• Power (P) = 2kw =2000W

  Current (I) = 5A

  Voltage (V) = 220V

• Power = current × voltage

  therefore P = I × V

• Current = Power/voltage

  I = P/V

  I = 2000/220

• I = 9.0909 A

• As the amount of current flowing in the conductor is more than 5 A which is the safe limit, then the fuse will get broken and hence the circuit will get open.

An electric oven of 2kW power rating is operated in a domestic electric circuit that has a current rating of 5A. If the supply voltage is 220V, what result do you expect? Explain. What is the value of current?

• Power (P) = 2kw =2000W

  Current (I) = 5A

  Voltage (V) = 220V

• Power = current × voltage

  therefore P = I × V

• Current = Power/voltage

  I = P/V

  I = 2000/220

• I = 9.0909 A

• As the amount of current flowing in the conductor is more than 5 A which is the safe limit, then the fuse will get broken and hence the circuit will get open.

An electric oven of 2kW power rating is operated in a domestic electric circuit that has a current rating of 5A. If the supply voltage is 220V, what result do you expect? Explain. When will the circuit will get open?

• Power (P) = 2kw =2000W

  Current (I) = 5A

  Voltage (V) = 220V

• Power = current × voltage

  therefore P = I × V

• Current = Power/voltage

  I = P/V

  I = 2000/220

• I = 9.0909 A

• As the amount of current flowing in the conductor is more than 5 A which is the safe limit, then the fuse will get broken and hence the circuit will get open.

If three resistors of 6 Ω, 7 Ω and 10 Ω are connected in series. Calculate the equivalent resistance in the circuit.

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What is the equivalent or total resistance (R_e) across this circuit?

• 3 kΩ

• 10 kΩ

• 13 kΩ

• 18 kΩ

Solve for the total resistance of the circuit shown

• 50 V

• 1970 ohms

• 705 K ohms

• 20 Amps

How does resistance affect current?

• less resistance - less current
• more resistance - less current
• more resistance - more current
• resistance does not affect current

The method to solve for this scenario is known as the...

• Product Over Sum Method

• Reciprocal Method

• Value Over Number Method

• Scientific Method