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cseet
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HELP! PLSSS! - Physics
Hi All,
I badly need helpwith the below 2 questions... as for question 2, I worked out part a-c but I'm unable to complete part d... pls help and correct me if I am wrong.
really appreciate it!
cseet
1. A 125 W heater is designed to operate with an emf of 120 V.
Find the approximate power dissipated in the heater if the potential difference is decreased to 112 V. (Unit: W)
can somebody help me up with this?
2. A 5.2 F capacitor is charged to 1.4E2 V and is then connected across a 4.5E2 resistor. Answer the following questions:
All answers must have three significant digits unless otherwise specified.
(a) What is the initial charge on the capacitor? (Unit: microcoulombs, uC)
answer: 728 uC
(b) What is the initial current just after the capacitor is connected to the resistor? (Unit: milliamperes, mA)
answer: 311 mA
(c) What is the time constant of this circuit? (Unit: milliseconds, ms)
answer: 2.34 ms
but I'm Stuck on this question...
(d) How much charge is on the capacitor after 5.1 ms? (Unit: microcoulombs, uC)
can somebody help me up with this??
thanks again!
cseet
Hi All,
I badly need helpwith the below 2 questions... as for question 2, I worked out part a-c but I'm unable to complete part d... pls help and correct me if I am wrong.
really appreciate it!
cseet
1. A 125 W heater is designed to operate with an emf of 120 V.
Find the approximate power dissipated in the heater if the potential difference is decreased to 112 V. (Unit: W)
can somebody help me up with this?
2. A 5.2 F capacitor is charged to 1.4E2 V and is then connected across a 4.5E2 resistor. Answer the following questions:
All answers must have three significant digits unless otherwise specified.
(a) What is the initial charge on the capacitor? (Unit: microcoulombs, uC)
answer: 728 uC
(b) What is the initial current just after the capacitor is connected to the resistor? (Unit: milliamperes, mA)
answer: 311 mA
(c) What is the time constant of this circuit? (Unit: milliseconds, ms)
answer: 2.34 ms
but I'm Stuck on this question...
(d) How much charge is on the capacitor after 5.1 ms? (Unit: microcoulombs, uC)
can somebody help me up with this??
thanks again!
cseet