A voltmeter is a galvanometer with a high series resistance and is connected in parallel across the component whose voltage is being measured.
64932
The emf of a source which is equivalent to two batteries connected in parallel, whose emfs are equal to 8 V and 6 V having internal resistances of 1.4 ohm and 0.6 ohm respectively is
Per the provided answer hint, the capacitance becomes 2C under the stated change (answer taken from OCR answer_hint).
64934
A capacitor is charged to store an energy U. The charging battery is disconnected. An identical capacitor is now connected to the first capacitor in parallel. The energy in each capacitor is now
After connecting an uncharged identical capacitor in parallel, charge redistributes halving the voltage; total energy becomes U/2 and each capacitor stores U/4.
64935
When the conductivity of a semiconductor is only due to breaking of covalent bonds, the semiconductor is called
A pure semiconductor whose conductivity arises from thermal generation (breaking covalent bonds) is called intrinsic.
64936
The e.m.f. of a source which is equivalent to two batteries connected in parallel, whose e.m.f.'s are equal to 8 V and 6 V having internal resistances of 1.4 Ω and 0.6 Ω respectively is
The control grid in a CRT regulates beam current intensity by controlling the number of electrons reaching the screen.
64940
135. To get maximum current in a resistance of 3 ohms, one can use n rows of m cells (connected in series), connected in parallel. If the total number of cells is 24 and the internal resistance of a cell is 0.5 ohm, then
