For testing appliances the wattage of test lamp should be

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Very low

Low

High

Any value

answer is C.

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Detailed Solution

Concept: Wattage is the power expressed in watts. This is the amount of work or power consumed per unit time. One watt is one joule per second.
As the product of current and voltage is defined as Power. It is given by the equation

Where V is voltage and I is current. The equation of resistivity can be follows.

Where R is the resistance. We know that resistance is an obstacle to the flow of electricity. Therefore, the smaller the resistance, the more current will flow through the circuit and the better the performance. Higher resistance results in less current flowing through the circuit, resulting in poorer performance. The test lamp is used to test the device. The resistance should be low so as not to blow up the tester. A low test lamp resistance means a high wattage.
Hence, the correct option is 3.

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