A voltmeter is connected across a battery of emf 12 V and internal resistance of 10 Ω. If the voltmeter resistance is 230 Ω, what reading will be shown by the voltmeter?
E = 24 V, r = 380 Ω
i. Maximum current (Imax)
ii. Can battery start the motor?
Formula : Imax = E/r
Calculation : From formula,
Imax = 24/380 = 0,063 A
As, the value of current is very...
Given: E = 10 V, r = 3 Ω, I = 0.5 A
To find: i. Resistance of resistor (R)
ii. Terminal voltage of battery (V)
Formula: I = \(\frac{E}{R+r}\)
Calculation: From formula, R = \(\frac{E}{I}-r\)
∴...
i. Let n identical cells, each of emf E and internal resistance r, be connected in series. Let the current supplied by this combination to an external resistance R be...
