- APositive voltage
- BZero voltage
- CLower voltage level
- DHigher voltage level
Explanation:
In digital logic, higher voltage is defined as logic state '1' and lower voltage is defined as logic state '0'. The higher voltage need not necessarily be positive. For example, it is possible that state '0' is defined as −10 V and state '1' is defined as −5 V.
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Atom bomb consists of two pieces of
and a source of
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(a) Proton |
(b) Neutron |
(c) Meson |
(d) Electron |
When a current passes through the junction of two different metals, evolution or absorption of heat at the junction is known as
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(a) Joule effect |
(b) Seebeck effect |
(c) Peltier effect |
(d) Thomson effect |
A heating coil can heat the water of a vessel from 20℃ to 60℃ in 30 minutes. Two such heating coils are put in series and then used to heat the same amount of water through the same temperature range. The time taken now will be (neglecting thermal capacity of the coils)
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(a) 60 minutes |
(b) 30 minutes
|
(c) 15 minutes |
(d) 7.5 minutes |
What is the current (i) in the circuit as shown in figure
|
(a) 2 A |
(b) 1.2 A |
(c) 1 A |
(d) 0.5 A |
What will happen when a 40 watt, 220 volt lamp and 100 watt, 220 volt lamp are connected in series across 40 volt supply
|
(a) 100 watt lamp will fuse |
(b) 40 watt lamp will fuse |
|
(c) Both lamps will fuse |
(d) Neither lamp will fuse |
Electric bulb 50 W-100 V glowing at full power are to be used in parallel with battery 120 V, 10 W. Maximum number of bulbs that can be connected so that they glow in full power is
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(a) 2 |
(b) 8 |
(c) 4 |
(d) 6 |