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Physics Q4 review page

# Physics Q4 review page - 1 What is the equivalent...

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Unformatted text preview: 1. What is the equivalent resistance of four 10 Ohm resistors connected in parallel with one another? :0 to? M? 10 l l l r a a} {a gravitate acid inwmwwuwwwmumw 5.33.1” will? 2. What resistance must be placed in parallel to a 200 Ohm resistance to make the equivalent resistance of the parallel combination equal to 75 Ohms? QRIQ? gal AL t W _t.. .t “mm m. r 2m a 3 1?wa f the“ have) MM Wham 75ft. r {lme MMHmVWMWM emu~m~mwm if. ’3 am. “3 Quail. amt-t tum”. {tit ‘FS 3. Two resistors, R=50 and R=100 Ohms, are connected in parallel across a voltage source. You are told the current through the 50 Ohm resistor is 1 Amp. What is the current in the 100 Ohm resistor? Va “EQJLE WI“; 1 \i, sigma ﬂ,“ 5.0V W3 an”: Gun/«Mm (00.03. T5842 4. A car battery is rated at 12 Volts.‘ This isth'e vol't'éﬁe’ﬁc‘r'fiss the terminals when there is ﬁt 319.. r m rte 1. no current being drawn hour the battery. When 100 Amps is being drawn from the battery, the voltage of the battery measured across the terminals drops to 11 Volts. What is the internal resistance of the car batte ? M \ I l W Title ' ry 9M. we the? We? moves; W-m-‘w.w_.m.u,www.mmw. m. ,4“ we. .. . c a» ., 3:”; m Va Rt... 1: Elliﬂmrw a “Jaiﬁt V,» (Nata—(Mpg. 5NWI‘S are connected in parallel across a voltage source with a value of 100 V. The total power consumed by the two resistors is 100 Watts. What is the value of the resistance of either of the two identical resistors? 13'” m {I} t H (M, V3 " W... J 3., a WW;5.M3:R:7W. "a ‘32. Three resistors (20 Ohm, 10 Ohm and 5 Ohm) are connected in series across a 15 Volt battery. What is the power dissipated by the 5 Ohm resistor? V ( 5 v L, 2 A I T = '— F i l... an W a, t. K a. 45w V3151 :2: 20 i;- 35—”- E 10 rFoam Ln BIL = (IT>ZC5-Q) d. I‘OXW 5 =i¢ﬂZVJl 2. .Some light bulbs are connected in parallel to a 120 V source as shown in the ﬁgure. Each bulb dissipates an average power of 60 W. The circuit has a fuse F that burns out when the current in the circuit equals or exceeds 9 A. From the list below, what is the largest number of light bulbs that be used without burning out the fuse? 120 V 9 FOR cow , (130/) = 60 a 9 . 7 1302.0) =60 ~ [Sis L I =CB-5/4 1‘ d‘ 34 "To/id aim/ted el 36 em q WW iii/“matV Ni (3mm sA/t‘m - 9W5 aa:\ I x l ‘ so at we an «on w ‘, 3. Three resistors are connected as shown in the ﬁgure. What is the equivalent resistance between the points Aand B? I _l 2.0 ( m4“ {lg—ﬁt) 2.0;: (i? 1 P Lg 4‘01).— —> A 3.09 “m a : Nag—Q" a. 3.89 :a- :3: r. 39:: V5351: 43351 d. 6:89 = ‘Li'Bﬂ 4. In the ﬁgure in #3, if you were told that the power consumed in the 4 Q resistor is 25 W, what would be the power consumed in the 2 Q resistor? a (PM 4Q: 25W b.12.5W .P=>La: 25W: vzﬁ‘w V=wvrut .50w {L ’r d_ . .25W 0 5. Two resistors, R] and R2, are connected in parallel across a battery. The total power consumed by the two resistors is P. Subsequently a third resistor, R3, is hooked in parallel with the ﬁrst two across the same battery. Which of the following best describes the result of this action: a. The total power consumed by the three resistors is less than P b. The current in R1 and R2 goes down, but is made up for by the current in R3 so that the total power consumed remains equal to P c. e total power consumed rises, but the current in R1 and R2 remains constant. d. All the current of from the battery is used up by R; and R2 so there is no current in R and the power remains constant at P 1. A parallel plate capacitor with air between its plates Stores 360 uC of charge when it is connected to a 9.00 V battery. How much charge can this capacitor hold if it is filled with a dielectric of dielectric constant K: 2.80 and connected to a 12.0 V battery? 35,”;‘9— (i) : l a : 9,09 l: C v 7,0H/ ﬂ (’17 C '2 K3114 a C.’ : KC, ‘ 14W(¥'°‘Mﬂ A C": MIL/«I: (a? 7!: (JV: ObiﬁF)C’er\/): faith/1C. 1‘ When a resistor is connected to :1 l5 ,0 V battery, it draws power at the rate of 0.640 W. What is the resistance of a resistor whose length is twice as long? L @7039 p:j:v.—. )1 )1769 i K \$19.29 V1 d)23.4§2 R: ,_ “my [Raise [LL/1L) e) none of the above ) 4A" A ~37 newﬂl: 1K / £1 1%: 1 [11 £15le )3 0 Huh; : 7033— 2. When a resistor is connected to a 150 V battery, it draws a curren_t_of 280 mA, What current does a resistor that has twice the diameter draw when connected to the same battery? a)140mA v V: Iﬂ b)560mA ,9 V -_ c)70,0mA K: M e [’r‘ q £5,542 d 1120mA I 0.191% e) none of the above L L ( L L R“- ; = few-— aft-rt H 27511 ﬂag zit, ‘r I 1 5‘ I? " y K / w my, _ 1 7 4(1) K (g) r ...
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Physics Q4 review page - 1 What is the equivalent...

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