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Published on: 13/05/2022
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Questions + Answers key
Take MCQ Science Test1.
Give the formula for the following
(i) Ohm's law
(ii) Joules law
(iii) Effective resistance for resistance in series
(iv) Power
(v) Specific resistance
2.
Out of 100 W and 40 W bulbs, which has high electrical resistance when in use.
3.
Write the difference between electric energy and electric power.
4.
Write the difference between conductor and insulator.
5.
Write the difference between ammeter and voltmeter.
1.
(i) V = IR
(ii) H = I2Rt
(iii) Rs = R1 + R2
(iv) P = VI
(v) \(\rho=R\frac{A}{L}\)
2.
40W. for the same applied voltage, power \(\alpha \frac{1}{resistance}\) If the power is less, higher will be its resistance.
3.
| Electric power | Electric energy | |
| i) | Rate of consumption of electric energy | The work done by the source in maintaining the flow of electric current |
| ii) | P = \(\frac{W}{t}\) | E = P x t |
| iii) | SI unit is watt | SI unit is joule |
4.
| S. No | Conductor | Insulator |
| i) | Materials which | Materials which do not allow current |
| ii) | Resistivity is less | Resistivity is high |
5.
| S. No | Ammeter | Voltmeter |
| i) | It measures current | It measures potential difference |
| ii) | It is connected in series | It is connected in |
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
