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A galvanometer coil has a resistance of 15 Ω and the metre shows full scale deflection for a current of 4 mA. How will you convert the metre into an ammeter of range 0 to 6 A?
Chapter: [4] Moving Charges and Magnetism
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A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system ______.
Chapter: [2] Electrostatic Potential and Capacitance
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To obtain 3 μF capacity from three capacitors of 2 μF each, they will be arranged ______.
Chapter: [2] Electrostatic Potential and Capacitance
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The positive terminal of 12 V battery is connected to the ground. Then the negative terminal will be at ______.
Chapter: [2] Electrostatic Potential and Capacitance
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Consider the following statements regarding series grouping of capacitors and select the correct statements.
- Charge on each capacitor remains same and equals to the main charge supplied by the battery.
- Potential difference and energy distribute in the reverse ratio of capacitance.
- Effective capacitance is even les than the least of teh individual capacitances.
Chapter: [2] Electrostatic Potential and Capacitance
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A capacitor works in ______.
Chapter: [2] Electrostatic Potential and Capacitance
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In a charged capacitor, the energy is stored in ______.
Chapter: [2] Electrostatic Potential and Capacitance
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A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor ______.
Chapter: [2] Electrostatic Potential and Capacitance
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Capacitors are used in electrical circuits where appliances need more ______.
Chapter: [2] Electrostatic Potential and Capacitance
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The work done in placing a charge of 8 × 10–18 coulomb on a condenser of capacity 100 micro-farad is ______.
Chapter: [2] Electrostatic Potential and Capacitance
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In a charged capacitor, the energy resides ______.
Chapter: [2] Electrostatic Potential and Capacitance
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Constantan wire is used for making standard resistance, because it has ______.
Chapter: [3] Current Electricity
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Why is the Wheatstone bridge better than the other methods of measuring resistances?
Chapter: [3] Current Electricity
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If in the experiment of Wheatstone’s bridge, the positions of cells and galvanometer are interchanged, then balance point will ______.
Chapter: [3] Current Electricity
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In a wheatstone bridge in the battery and galvanometer are interchanged then the deflection in galvanometer will ______.
Chapter: [3] Current Electricity
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The AC voltage across a resistance can be measured using a ______.
Chapter: [4] Moving Charges and Magnetism
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The deflection in a moving coil galvanometer is ______.
Chapter: [4] Moving Charges and Magnetism
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The current sensitivity of a galvanometer is defined as ______.
Chapter: [4] Moving Charges and Magnetism
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A moving coil galvanometer has N number of turns in a coil of effective area A, it carries a current I. The magnetic field B is radial. The torque acting on the coil is ______.
Chapter: [4] Moving Charges and Magnetism
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An electric charge in uniform motion produces ______.
Chapter: [4] Moving Charges and Magnetism
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