A voltmeter should have large resistance.
Explanation:
Þ An ammeter should have small resistane. To measure the accurate reading of current in the circuit by Ammeter.
þ A voltmeter should have large resistance. To measure the accurate reading of voltage across voltmeter.
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What causes chromatic aberration?
What is the effective capacitance between points X and Y
|
(a) 24 μF |
(b) 18 μF |
(c) 12 μF |
(d) 6 μF |
A count rate meter shows a count of 240 per minute from a given radioactive source. One hour later the meter shows a count rate of 30 per minute. The half-life of the source is
|
(a) 120 min |
(b) 80 min |
(c) 30 min |
(d) 20 min |
The electrical circuits used to get smooth d.c. output from a rectifier circuit is called
|
(a) Filter |
(b) Amplifier |
(c) Full wave rectifier |
(d) Oscillator |
A convex lens is made of a material having refractive index 1.2. Both the surfaces of the lens are convex. If it is dipped into water $(\mu=1.33),$ it will behave like:
